690 NATURAL HISTORY MISCELLANY. 
with aversion by the farmers. But this latter is a Northern grass, not 
found at the South, while the Bur-grase is to be found only beyond the 
i fN 
4 ham, from Wisc 
Minnesota; and in the Middle and Southern States, according to other 
observers. The specimen sent to us by Mr. Nott is C. echinatus Muhlen- 
burg (Descriptio Uberior Graminum, p. 51) and figured by Plunkenet (Phy- 
tographia tab. 92-3). It is described by Dr. Chapman in his ‘‘ Flora a of 
the Southern United States," p. 578; and another species, the C. tribu- 
loides, which grows on the seashores of Delaware, Carolina, etc., known 
as the Coc ckspur or Bur-grass, is also familia» to farmers, an much 
dreaded. As much as we detest the Couch-grass of our northern farms, 
we are to rejoice in the absence of these spiny and thorny spiked and 
urred-grasses in our northern soils. In some sections where the land is 
light, the Couch-grass makes a nutritious fodder and hay, being ee 
eaten by horses and cows; but we suspect that these sagacious anima 
would not care to aor the flowers and seeds of the ‘‘ Sand me 
although the leaves and stems of C. pend ior tender and abund- 
ant, and we can p understand that it is very annoying where it 
T grows.—J. L 
IN BrossoM.—I have just found Angst 98th, 1870) the 
ai es anes orn. flowering abundantly in a pool at Sandwich, 
Ontario, on she Detroit River. I enclose specimens. I discovered this 
quarters of an inch thick. We find it, also (though not fertile), some 
miles higher up the river, at Connor's Creek, Michigan, but nowhere eise 
along the shores. Though Gray says “flowers and fruit not seen," it has, 
t b 
wig next "n in my aquarium, the little plants at once ‘‘ righted them- 
sion of the pool, driving out the Lemna, which is ** few and far between," 
and of a sickly, degraded type. — Henry GILLMAN, Detroit, Michigan. 
ZOOLOGY. 
ABDOMINAL oo IN A ou Ly. — While engaged in naming & 
— of microscopic preparations of insects mounted on slides by 
. W. Sta icm PEDE. ei me collection of Dr. T. D’Oremieulx 
and Paus York, my attention was drawn to a sense-organ situated on the 
female anal appendages of a "ind of Chrysopila, allied to C. ornata 
